{
  "manageEntity": {
    "action": "Save",
    "entityId": "1951443517",
    "entityType": "Track",
    "nonce": "0xbdbd8865b98cf40dc9786b660ef63e12b7d27b407a8daa919755817eeaaa5a62",
    "signature": "0x3c80b73b72382c489912437dd4c64cd3e948775cfdc93ceaf2206fcb3daf85026e80b357d62a847ae79d2e61984b0144d9d8d7a55a40d26cd6a3ad0d99f1aa371b",
    "signer": "0x3D472a01Cb831ac594835ac6038A4346E2A22B94",
    "userId": "327343"
  }
}